Combination dental tool



(No Model.)

J. J. R. PATRICK.

COMBINATION DENTAL TOOL.

No. 399,071. Patented Mar. 6, 1889.

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coiviBiNATloN DENTAL root.-

SPECIFICATION fonning part of Letters Patent No 399,071, dated March 5, 1889'.-

Applioation filed August 31, 1888i Serial No 284,275. (No model.)

To all 1171.071), it may concern..-

lle it known that 1, JOHN J. R. PATRICK, a citizen of the lilnited States, and a resident of llellerille, in the county of St. Clair and State of Illinois, have in vented certain new an d use :t'ul Improvements in Combination Dental Tools; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use i the same, reference being had to the accoml l l l i panyiug drawings, and to letters or figures of 5 reference marked thereon,which form a part I ot this specification.

Figure .l of the drawings is a representa-l tion of this invention and is a side view. Fi

2 is a view sln nving the other side, the rear? portion of thepliers being brokenaway. Fig. 1; is a top view of the upper front portion.

operation.

Referring to the drawings, A designates the pliers, I; shows steel cutting-blades for cut ting wire and other metals, and C is a setscrew inserted through a threaded opening in one of the plier-jaws, designed to regulate the closing of the jaws. A milled head, (I, is provided,so that the screw can be operated with the fingers.

In dent stry metal posts are used for the purpose ol? securingan artificial crown to the root of the tooth, and as the roots and. canals of all teeth taper it desirable not to drill a hole therein for the insertion of the tapered end of a metal post, and difficulty is found. to secure the tapered posts in the root, as they are at present not provided with athread. For the purpose of forming a thread on such tapered posts, I provide the tapered screwdics D at each side between the jaws. ()ne pair of said dies may be smaller than the other. To form a thread on the post, the tapered end thereof is held with a moderate pressure between the two sections of the dies, and the post is then turned to the left,or out The greater number of said tools rely upon the pliers tor I is of the dies. The screw 0 maybe adjusted to regulate the closing of the dies.

E is a taper-cutter on the outer side of one of the jaws for tapering the wire from which the post is formed before the thread is cut. The said device has a tapered opening, I), longitudinally through it, and the top of said opening opens outward in V form in cross section, as at c, and one edge, (7, is sharpened and extends slightly over toward the center of the opening I). As the wire is inserted into the larger end or the opening I), it is to be turned to the right against the cutting-edge, as it pushed inwardly, and thus the wire orpost is tapered by shavin g a portion of it off.

F is a barb-cutter having its main portion threaded and inserted through a rearwardlyinclined opening in the jaw, as shown, and having its inner end sharpened in chisel form. The cutter designed to barb delicate taperin g wire used by dentists to clean out the dead nerves from the teeth.

As the barb-cutter is threaded, it may be regulated to cut the barbs at an angle to the wire, it so desired, and the screw C may be adjusted to prevent the cutter from entering the wire too far.

l laying described my iuveu tion,whatl claim .1. In. a dental tool, the pliers having tapered screw-dies l) between the jaws, and the regulating set-screw t, substantially as specilied.

2. in a dental. tool, the combination of the pliers, the screw-dies, and. the tapei eutter on one of the jaws, substantially as specified;

3. In a combination dental tool, the adjustable barlii-cutter, substantially as specified.

4. In a combination dental tool, the pliers, the barb-cutter having a chisel point, and the set-screw, substantially as specified.

In a combination dental. tool, the combination of the pliers, the set-screw, the cut tor-blades, the serew-tlneaded dies, the tapercutter, and the barb-cutter, sul'istantially as speci lied.

In testimony whereof I affix m y signature in presence of two witnesses.

JOHN J. R. PATRICK.

Witnesses:

FREDERICK SUNKEL, PHIL. lass. 

